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Only MPEG 4 can support HD TV and not MPEG 2 .......
- Thread starter IndianMascot
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MPEG2 and 4 are compression technologies.Its not that MPEG2 can not support HDTV but for bandwidth/transponder space required to transmit HDTV in MPEG2 format wud simply be too much expensive and a technology blunder when a better technology is available.
IndianMascot
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That again means that Service Providers using MPEG2 technology will always have less HD channels as compared to MPEG4, because in next one yr almost all Top Channels would be HD i suppose ....Comments pls ... 🙁
No, the new STBs they give are MPEG4 compatible. Any customer going for HD STB will have MPEG4 compatible STB.HD channels will be broadcasted in MPEG4 only and viewer will also not face problem.So HD channels can be same as long as they have enough space. All DTH providers are buying more transponders anyway.
Only MPEG 4 can support HD TV and not MPEG 2 .......
Is this True ???
I think your ques. has a typo....instead of MPEG 4 can support HD TV you meant only MPEG 4 can support HD channels?
If yes than you have got the answer frm amish, MPEG 4 is 30% more efficient than mpeg2 at same pic. quality.
If no then, ur HD TV does not understand whether mpeg 4 or 2 is fed to it, it understands only a certain set of communication standards like HDMI, component cable system, AV system, CATV system etc etc...all having their respective ports and protocols. It is up to the satellite STB/cable STB..to the decode the mpeg4/2 signals and transfer it to a particular port with a standard protocol attached with it.
(But yes if ur watching movie etc from USB etc. then the HDTV needs to support mpeg4/2 etc codecs)
Is this True ???
I think your ques. has a typo....instead of MPEG 4 can support HD TV you meant only MPEG 4 can support HD channels?
If yes than you have got the answer frm amish, MPEG 4 is 30% more efficient than mpeg2 at same pic. quality.
If no then, ur HD TV does not understand whether mpeg 4 or 2 is fed to it, it understands only a certain set of communication standards like HDMI, component cable system, AV system, CATV system etc etc...all having their respective ports and protocols. It is up to the satellite STB/cable STB..to the decode the mpeg4/2 signals and transfer it to a particular port with a standard protocol attached with it.
(But yes if ur watching movie etc from USB etc. then the HDTV needs to support mpeg4/2 etc codecs)
IndianMascot
Addicts
@ amish & devx101 - Thanks guys 🙂 for thr KT. I was going through journal of John Hartung (EGT, CTO) regarding the crisis among MPEG2 technology operators in US, and it says that 1. HD channels will be transmitted in MPEG4 over the satellite @ a rate of 8 mbps and whereas MPEG2 technology transmits @ 19 mbps. that means a bandwith constraints for older operators.2. In US solution to this is , they had proposed an architecture to transcode MPEG4 signals to MPEG2 . Bt Its not sure whether it had been implemented because Direc TV is already having 170 HD Channels.3. What I think the factor which allows more HD channels even on MPEG2 is new transmission protocol (DVB-S2 ).Please correct wherever I am wrong . 🙁
IndianMascot
Addicts
Its a huge one.... I even read only the required ones 😉
http://www.amt.com/images/products/MPEG-4_to_MPEG-2HDTV_Network_WhitePaper.pdf
Also you can find little information here:
Like its competitors, DirecTV offers high-definition television (HDTV) and interactive services.
To handle the proliferation of bandwidth-intensive HDTV broadcasting, DirecTV rebroadcasts local HDTV stations using the H.264/MPEG-4 AVC codec while employing a newer transmission protocol (DVB-S2) over the newer satellites. This allows DirecTV to squeeze much more HD programming over its satellite signal than was previously feasible using the older MPEG-2 compression and DSS protocol it has been using. This technology will be gradually expanded to the existing satellites as customer equipment is replaced with new MPEG-4-capable receivers.
Receiving the channels encoded in MPEG-4 requires newer receivers, such as the H20 as well as the 5-LNB Ka/Ku dish. DirecTV has contracted with Britain's Pace Micro Technology, Korea's LG Electronics and France's Thomson to manufacture these new receivers. Pace manufactures the DirecTV Plus HD DVR (Model HR20-700, and HR21-700) and LG Electronics offers the Model H20-600 receiver, while Thomson provides the Model H20-100 and HR20-100 DVR receivers. DirecTV has admitted to software issues with some of the H20 receivers and HR20 DVRs, which have been plagued with random problems since they were released in mid-2006. DirecTV regularly released software updates for the HR20 receivers, in an effort to reduce issues to an acceptable level.
DirecTV has phased out its original TiVo-branded HD DVR, the HR10-250, which can only decode the older MPEG-2 signals. All DirecTV-delivered local HDTV stations (outside of the NYC and LA network stations) are encoded in MPEG-4. The HR10-250 cannot receive the MPEG-4 local HDTV stations in these markets but can still receive over-the-air ATSC broadcasts in these markets. After a multi-year hiatus, TiVo and DirecTV are developing a new TiVo enabled HD DVR that will be able to receive/decode DirecTV's current MPEG-4 satellite signals. Originally slated for release in 2010, no official amended launch date has been set. Both DirecTV and Tivo claim development is ongoing and the project has not been canceled.
http://www.amt.com/images/products/MPEG-4_to_MPEG-2HDTV_Network_WhitePaper.pdf
Also you can find little information here:
Like its competitors, DirecTV offers high-definition television (HDTV) and interactive services.
To handle the proliferation of bandwidth-intensive HDTV broadcasting, DirecTV rebroadcasts local HDTV stations using the H.264/MPEG-4 AVC codec while employing a newer transmission protocol (DVB-S2) over the newer satellites. This allows DirecTV to squeeze much more HD programming over its satellite signal than was previously feasible using the older MPEG-2 compression and DSS protocol it has been using. This technology will be gradually expanded to the existing satellites as customer equipment is replaced with new MPEG-4-capable receivers.
Receiving the channels encoded in MPEG-4 requires newer receivers, such as the H20 as well as the 5-LNB Ka/Ku dish. DirecTV has contracted with Britain's Pace Micro Technology, Korea's LG Electronics and France's Thomson to manufacture these new receivers. Pace manufactures the DirecTV Plus HD DVR (Model HR20-700, and HR21-700) and LG Electronics offers the Model H20-600 receiver, while Thomson provides the Model H20-100 and HR20-100 DVR receivers. DirecTV has admitted to software issues with some of the H20 receivers and HR20 DVRs, which have been plagued with random problems since they were released in mid-2006. DirecTV regularly released software updates for the HR20 receivers, in an effort to reduce issues to an acceptable level.
DirecTV has phased out its original TiVo-branded HD DVR, the HR10-250, which can only decode the older MPEG-2 signals. All DirecTV-delivered local HDTV stations (outside of the NYC and LA network stations) are encoded in MPEG-4. The HR10-250 cannot receive the MPEG-4 local HDTV stations in these markets but can still receive over-the-air ATSC broadcasts in these markets. After a multi-year hiatus, TiVo and DirecTV are developing a new TiVo enabled HD DVR that will be able to receive/decode DirecTV's current MPEG-4 satellite signals. Originally slated for release in 2010, no official amended launch date has been set. Both DirecTV and Tivo claim development is ongoing and the project has not been canceled.